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- W1965068132 abstract "Photocontrol of weed germination of arable annual weeds Field studies were conducted to test the effect of light during soil tillage on the emergence of common weed species. Soil tillage was conducted at night or during daylight. In 20 out of a total of 23 field experiments, weed density after nighttime tillage was reduced compared to conventional daytime tillage. The average reduction of weed density attributable to photocontrol was 28.4 %. Results of field trials in the literature suggest that the emergence of Chenopodium album, Matricaria species and Stellaria media is especially reduced by nighttime tillage practices, but photocontrol had almost no effect on the emergence of Galium aparine and Polygonum convolvulus. The level of reduction of weed emergence after nighttime tillage was very variable. Important factors affecting this variation were: (1) the different light sensitivities of weed species, (2) the different light sensitivities of populations within one species, (3) the dormancy status of the seeds in a natural seed bank, and (4) the variation of light sensitivity of seeds. In dieser Untersuchung wurde die Wirkung der photobiologischen Unkrautkontrolle auf die Unkrautdichte im Feldversuch unter Praxisbedingungen quantifiziert. In 20 von 23 Feldversuchen war die Unkrautanzahl nach Nachtbodenbearbeitung geringer als nach konventioneller Tagbodenbearbeitung. Im Durchschnitt aller 23 Versuche liefen 28,4 % weniger Unkräuter nach Nachtbodenbearbeitung auf. Resultate anderer Arbeitsgruppen und die eigenen Ergebnisse lassen den Schluß zu, daß vor allem die Keimung der Unkrautarten Chenopodium album, Matricaria species und Stellaria media sehr häufig durch Licht gefördert wird und diese Arten mit hoher Wahrscheinlichkeit durch Nachtbodenbearbeitung zurückgedrängt werden können. Dagegen wurde die Keimung von Galium aparine und Polygonum convolvulus nur selten durch Nachtbodenbearbeitung verhindert. Das Ausmaß der Unkrautreduzierung durch photobiologische Unkrautkontrolle ist sehr starken Schwankungen unterworfen." @default.
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- W1965068132 date "2002-12-01" @default.
- W1965068132 modified "2023-09-25" @default.
- W1965068132 title "Photobiologische Unkrautregulierung annueller Ackerunkrauter" @default.
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- W1965068132 doi "https://doi.org/10.1046/j.1439-037x.2002.00575.x" @default.
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